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湖南锡田钨锡多金属矿床成矿地质特征及成矿模式 总被引：6，自引：0，他引：6
通过对锡田钨锡多金属矿床地质特征的研究,认为锡田矿区钨锡多金属矿体的形态、产状及空间展布严格受岩体接触带及断裂构造控制;矿床类型主要为矽卡岩型,其次为破碎带蚀变岩型、云英岩型等;钨锡多金属成矿作用与岩浆活动密切相关:印支期花岗岩浆侵位形成矽卡岩型钨锡矿(化)体;燕山期花岗岩浆侵位导致早期矿化矽卡岩发生叠加矿化,同时在构造破碎带中形成云英岩型锡矿或破碎带蚀变岩型钨锡多金属矿体,是形成规模巨大的钨锡多金属工业矿床的必要条件.此外,提出了锡田矿区钨锡多金属矿的成矿模式. 相似文献
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《吉林大学学报(地球科学版)》2015,(Z1)
<正>1矿床地质概况柿竹园超大型钨多金属矿床位于湖南省郴州市东南郊,矿田内出露地层主要为泥盆系中、上统碎屑岩和碳酸盐岩以及少量震旦系变质石英砂岩。花岗岩质岩浆活动大体分为3大类,千里山碱长花岗岩岩体、岩枝和岩脉以及成矿后的花岗斑岩等。岩枝和岩脉与岩体相连,是岩浆自岩体中分离沿NE向断裂充填的结果,其中富含石榴子石、萤石、黑钨矿等副矿物。岩体顶部接触带发育似伟晶岩壳和块状云英岩(矿体)。主要矿化类型为矽卡岩型,少量块状云英岩型,在矿床外围泥盆系灰岩中发育大规模的脉状铅锌矿。矽卡 相似文献
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湖南柿竹园矽卡岩-云英岩型W-Sn-Mo-Bi矿床地质和成矿作用 总被引：7，自引：2，他引：7
柿竹园钨多金属矿床由三个阶段不同成矿作用复合叠加而形成。它们分别与似斑状黑云母花岗岩、等粒黑云母花岗岩和花岗斑岩脉有着成因联系。第一阶段矿化包括含矿块状外质矽卡岩和含矿退化蚀变岩；第二阶段为云英岩矿化，在空间上叠加于块状矽卡岩及外部的大理岩；第三阶段为与锰质矽卡岩相伴生的铅锌银矿化。本文详细地描述了前两阶段矿化的地质和成矿地球化学特征，并探讨了其成矿过程。在此基础上，建立了柿竹园矿床的多阶段成矿模 相似文献
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南岭成矿带是全球最重要的钨锡成矿带之一,区内钨锡成矿条件优渥,是开展钨锡找矿勘查的重要目标区。然而如何开展钨锡找矿工作,尤其是在已有矿床周缘圈定成矿远景区,是钨锡成矿作用研究以及找矿勘查工作关注的重要科学问题。双园冲矿床位于南岭成矿带中西段,处于荷花坪与柿竹园两个大型锡钨多金属矿田中间,并与两个矿田处于同一构造体系,但目前对该矿床的研究程度较低,由此也制约了其矿床成因研究及该区的找矿部署。本次研究获得双园冲云英岩化花岗岩的锆石和独居石原位LA-ICP-MS U-Pb年龄分别为161.2±2.5Ma和157.1±1.8Ma,与云英岩型矿石中锡石原位LA-ICP-MS U-Pb年龄(158.9±2.9Ma)一致,二者均形成于晚侏罗世,表明其具有密切的成因关系,这一年龄也与南岭成矿带钨锡成矿大爆发时代(150-160Ma)一致。综合对比双园冲锡矿及与其空间相邻的柿竹园和荷花坪锡多金属矿田特征显示,三者成岩成矿时代一致,岩体侵位和矿体分布均受NE向断裂控制,矿体也均赋存于中-上泥盆统碳酸盐岩地层中,并且成矿花岗岩具有相似的岩石学特征和岩浆源区。综合以上信息,本文提出三个矿床可能形成于同一次岩浆热液活动,成矿岩体可能来自地壳深部同一个大岩浆房,柿竹园和荷花坪之间的区域具有发育晚侏罗世花岗岩体及相关钨锡矿的较大潜力。根据双园冲锡矿及其周缘大型锡钨矿床浅部脉状Pb-Zn-Fe-Mn矿化和深部矽卡岩-云英岩型Sn-W矿化的特征,提出研究区乃至整个南岭地区浅部脉状Pb-Zn-Fe-Mn矿化是深部Sn-W找矿勘查的有利部位。 相似文献
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东昆仑祁漫塔格西段白干湖超大型钨锡矿田地质特征及其矿化交代岩分类 总被引：5，自引：2，他引：3
白干湖钨锡矿田位于东昆仑祁漫塔格西段新疆维吾尔自治区若羌县境内.笔者通过对柯可卡尔德、白干湖、巴什尔希和阿瓦尔4处矿床实地剖析,认为这些矿床已构成一个集矽卡岩型、云英岩化花岗岩微细网脉浸染型和石英脉型交代、充填叠加复合的具超大型远景规模的钨锡矿田.矿田内矿化类型显示出一定的分布规律或分带性:即产于花岗岩边部外接触带的矽卡岩型白钨矿矿体,呈透镜状或似层状分布在金水口群浅变质岩系大理岩内;产于花岗岩小突起内侧及其顶部外接触带伸枝脉岩的云英岩化花岗岩微细网脉浸染型钨锡矿体,前者呈厚板状透镜体面型分布,后者则呈脉状线型分布于围岩地层中;产于隐伏花岗岩突起上部外接触带的石英脉充填交代型锡石黑钨矿矿体,其因受区域NE向白干湖深大断裂构造限制,多呈低缓角度的平行脉状充填于金水口群浅变质岩系的绢云石英片岩中.根据矿石矿物组合等特征,矿田内的矿化蚀变可划分为3种:即矽卡岩化、云英岩化(包括钠长石化、电气石化等)和硅化.研究表明,矿田内矽卡岩型白钨矿化、云英岩化花岗岩微细网脉浸染型钨锡矿化和石英脉充填交代型锡石黑钨矿化构成一个与加里东期中细粒(似斑状)二长花岗岩侵入活动有成因联系的矿田成矿系列,属于岩浆期后高温-气化热液交代和中低温热液充填交代形成的产物. 相似文献
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赣南九龙脑矿田位于南岭构造-岩浆成矿带东段诸广山崇（义）—（大）余—（上）犹钨锡多金属矿集区,其最大特色以九龙脑成矿岩体为中心,产出一系列钨锡银铅锌铌钽多金属矿床（化）,矿化类型包括内带-外带热液石英脉型、矽卡岩型、破碎蚀变带型、云英岩型和蚀变花岗岩型,成矿时代始于印支期,燕山早期大爆发,成矿母岩为富含W、Sn等成矿元素的重熔“S”型花岗岩。本文在系统研究以往地质、地化和物探等资料的基础上,阐述了九龙脑矿田成矿地质特征和地层、构造、岩浆岩控矿作用,以及围绕九龙脑成矿岩体内外接触带由内到外发育高温钨锡矿床—中高温钨铅锌银矿床—中低温金银铅锌矿床的成矿与地球化学分带,总结了该区钨锡多金属矿床受构造-岩浆岩联合控制呈现出“东西成行、北北东—北东成列”的等距性空间分布规律,建立了九龙脑矿田具成因联系的“多位一体”成矿模式。根据上述研究进行了成矿预测,优选九龙脑地区钨锡矿A类预测区4个,钨铅锌银矿、锡矿B类预测区各1个,金银铅锌矿C类预测区1个。 相似文献
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大东山锡矿田矿化类型复杂,其中矽卡岩型锡矿规模大,可分含锡矽卡岩型和硫化物矽卡岩型。岩体区有脉状和面状云英岩产出,前者多具锡矿化,后者具钨矿化。燕山第四期花岗岩是锡(钨)成矿母岩,含SiO274.96%~75.28%,K2O+Na2O7.37%~8.54%,K2O>Na2O,与南岭地区钨锡成矿岩体具有相似的岩石化学特征。锡矿成因类型可划分为接触交代型、侵入岩浆热液型和风化矿床。根据成矿地质条件,认为在接触带寻找硫化物矽卡岩、硫化物型锡矿有较大前景,而在岩体区具有寻找云英岩型钨矿的潜力。 相似文献
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在大湖塘北区钨矿找矿勘查过程中,在总结分析20世纪80年代初针对石英大脉型黑钨矿的普查资料基础上,通过地表填图和老窿编录,发现前人认为的混合黑云母花岗岩与混合白云母花岗岩之间为截然清楚的侵入接触关系,二者之间稳定地分布着一层似伟晶岩壳;由空间关系和区域成矿规律推断似斑状黑云母花岗岩为燕山期侵入于晋宁期黑云母花岗闪长岩之中的成矿母岩。晋宁期黑云母花岗闪长岩为成矿有利围岩,在云英岩化等蚀变过程中释放出形成白钨矿的钙离子。燕山期似斑状黑云母花岗岩岩株与晋宁期黑云母花岗闪长岩岩基之间的侵入接触界面是最主要的成矿构造与成矿结构面,控制了主矿体的位置、形态与产状。在研究区内首次于新元古代花岗闪长岩中发现厚大的白钨矿工业矿体,并根据不同岩块混杂、被长英质充填物胶结等特征识别出热液隐爆角砾岩型矿体。基于对矿区成矿地质条件和矿床地质特征的新认识,修改了针对石英大脉型黑钨矿所做的详查设计,抓住细脉浸染型白钨矿这一主要矿床类型,及时调整了找矿目标和勘查手段,在短时间内实现了赣北地区钨多金属找矿的重大突破。通过与石门寺矿段成矿地质条件类比,预测毗邻的苗尾矿段与太平洞矿区找矿潜力大。 相似文献
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浆液过渡态流体在矽卡岩型钨矿成矿过程中的作用——以湖南柿竹园钨锡多金属矿为例 总被引：9，自引：2，他引：7
湖南杮竹园是世界著名的大型矽卡岩型锡钨多金属矿床,产于千里山碱长花岗岩岩体南部接触带。矽卡岩中广泛发育网脉状碱交代脉和少量花岗岩脉、云英岩脉等各类脉体。碱交代脉主体由钾长石、萤石、少量石英、磁铁矿、黑钨矿、白钨矿及花岗岩构成,以往被统称为"云英岩脉"。其中早阶段碱交代脉中央发育花岗岩,边部为钾长石-萤石-黑钨矿,脉体两侧发育石榴子石透辉石矽卡岩化,对应矽卡岩阶段。晚阶段碱交代脉主要成分为钾长石、萤石,脉体及两侧出现大量阳起石、绿帘石、磁铁矿、白钨矿及辉钼矿、辉铋矿、自然铋等,对应退变质氧化物阶段。空间上,碱交代脉分布于矽卡岩和矽卡岩化大理岩中,不进入岩体。自花岗岩体→岩脉→碱交代脉→矽卡岩,Ca O、Ti O2、成矿元素W、Bi、Mo、Cu、Pb、Zn以及Sr、Ba等元素含量增高,显示出成矿元素向热液中富集,且岩浆和矽卡岩受到碳酸盐岩围岩的影响。碱交代脉的组构显示出其形成于富含成矿物质和挥发份流体的岩浆,其中广泛发育熔融包裹体和熔流包裹体,显示其浆液过渡态流体的成因性质。从岩浆晚期分异演化→热液阶段是连续演化的过程,块状云英岩和矽卡岩阶段,岩浆并未完全固结,成矿作用自岩浆固结之前已经开始。总结了杮竹园矿床成矿模型:碱长花岗岩岩浆演化晚期分异出的高度富含挥发份的熔浆,在岩体顶部聚集,部分形成似伟晶岩(壳)和块状云英岩以及条带状硅灰石符山石矽卡岩。进一步聚集以及矽卡岩化产生大量CO2引起大规模隐爆,富含挥发份的岩浆或浆液过渡态流体沿隐爆形成的碎裂裂隙进入碳酸盐岩围岩,与碳酸盐岩不断发生反应,在脉体边部形成钾长石化以及大范围的石榴子石透辉石矽卡岩化。至退变质氧化物阶段,随着岩浆冷凝和温度、压力的降低,地下水大范围参与,成矿流体逐渐转变为热液性质,形成大量阳起石、磁铁矿、白钨矿及钼、铋硫化物。硫化物阶段,大量的大气降水参与成矿,温度、盐度进一步降低,在矽卡岩及其外侧的碳酸盐岩中形成铅锌硫化物矿石。 相似文献
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ZANG Wenshuan WU Ganguo ZHANG D LI Jinwen ZHANG Xiangxin LIU Aihua ZHANG Zhongyi Faculty of Geosciences Resources China University of Geosciences Beijing Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 《《地质学报》英文版》2004,78(2):548-557
The Xinqiao S-Fe-Cu-Au orefield is located in the Tongling ore cluster in the middle and lower reaches of the Yangtze River in East China. There have been many researches regarding the genesis of the Xinqiao orefield in recent years, showing that it belongs to various types, such as sedimentary-reformed type, stratabound-skarn type, sedimentary submarine rocks-hosted exhalative type. We propose that it was formed in two periods of mineralization base on systematic field observation and Pb and S isotopic analyses in nearly ten years. The first period was formed during a syngenetic sedimentary process, whereas the massive sulphide orebodies are mainly related to the Yanshanian granitic magmatism. Sulfide metallic mineral associations show zoning around a granite intrusion, i.e. magnetite and pyrite→pyrite, chalcopyrite and native gold→pyrite, sphalerite and galena. Gold orebodies occur outside the contact zone of the granite intrusion. 相似文献
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《International Geology Review》2012,54(11):1020-1039
The Shizhuyuan deposit is the largest among the economically important polymetallic tungsten deposits in China. The deposit occurs within the thermal aureole of Yanshanian felsic intrusions that were emplaced into Devonian carbonates and marls. The mineralization can be divided into three phases that are genetically associated with three episodes of granitic emplacement-pseudoporphyritic biotite granite, equigranular biotite granite, and granite porphyry. During the emplacement of pseudoporphyritic biotite granite, thermal metamorphism and subsequent skarnization developed around the stock. The pure limestone was transformed to marble, whereas marls and argillite interlayers were changed to a series of metamorphic rocks such as grossular-diopside hornfels, wollastonite hornfels, diopside hornfels, wollastonite-vesuvianite hornfels, muscovite-K-feldspar-anorthite hornfels, and prehnitevermiculite hornfels. Because of the subsequent strong skarn development, most hornfelses later were transformed into skarns. The skarns distributed around the granite stock are mainly calcic. They are massive in structure, and are composed mainly of garnet, pyroxene, vesuvianite, and wollastonite, with interstitial fluorite, scheelite, and bismuthinite. Although there is no cassiterite in the early skarns, their tin contents average 0.1%. The distribution and compositional and mineralogical relationships of skarn minerals suggest that they formed as a result of progressive reactions of a hydrothermal solution with a limestone of generally constant composition, and that the dominant process was progressive removal of Ca and addition of other constituents to the rocks. Following the primary skarn formation, some of the assemblages were retrograded to new assemblages such as fluorite-magnetite-salite rock, magnetite-fluorite-amphibole rock, and magnetite-fluorite-chlorite rock. The retrograde alteration of the skarns is characterized by a progressive addition of fluorine, alkali components, silica, tin, tungsten, and bismuth. A zonation from garnet-pyroxene skarn or garnet skarn, through fluorite-magnetite-salite rock, to magnetite-fluorite-chlorite rock frequently can be recognized in the deposit. All retrograde-altered rocks contain scheelite, cassiterite, molybdenite, and bismuthinite. During the emplacement of equigranular biotite granite, skarn veins several tens of centimeters wide were developed; they contain large crystals of garnet and vesuvianite, and interstitial scheelite, wolframite, cassiterite, and molybdenite. This second stage of mineralization occurs predominantly as coarse and fine stockwork greisens, which were superimposed on the massive skarns and surrounding marble. Such W-Sn-Mo-Bi-bearing greisens can be divided into topaz greisen, protolithionite greisen, muscovite greisen, and margarite greisen. Besides calcic skarn veins and greisens, manganese skarn veinlets also were developed; they consist of rhodonite, spessartine-almandine solid solution, spessartine, and helvite. The distribution of greisens is responsible for a metal zonation—i.e., W-Sn-Mo-Bi and Sn-Be-Cu-F zones from the contact boundary between the granite stock and skarns outward in the deposit. A third stage of mineralization is represented by lead-zinc veins, which also are accompanied by manganese skarns consisting of spessartine, rhodonite, manganese-rich pyroxene, helvite, tephroite, fluorite, tourmaline, and manganese-rich phlogopite. 相似文献
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岩前钨矿位于南岭东西向构造与滨太平洋北北东向构造带的交汇复合部位,南岭成矿带东段北部。主要矿床类型有矽卡岩型白钨矿和石英脉型黑钨矿,矿体产于燕山早期花岗岩内外接触带内。在区域地质和矿床地质研究的基础上,采用LA-ICP-MS 锆石U-Pb 法和辉钼矿Re-Os等时线方法,对与成矿关系密切的岩前花岗岩和含矿石英脉中辉钼矿进行精确定年,获得花岗岩的单颗粒锆石U-Pb谐和年龄加权平均值为(160.6±0.72) Ma,黑钨矿化石英脉中的辉钼矿为(159.2 ±2.3) Ma。这一成果揭示,花岗岩的就位年龄与含矿石英脉的形成几乎在相同热过程完成。结合前人研究,进一步得出南岭地区160~150 Ma成岩成矿作用主要分布于南岭中东段,成岩成矿作用与华南地区东部岩石圈大规模伸展的构造运动力学背景有关。岩前钨矿与区内盘古山、画眉坳、柿竹园等著名矿床具有相同的成矿时代、成矿背景和相似的成矿条件,属同一个成矿亚系列,预测岩前钨矿具有较大的找矿潜力,重点突破对象为内接触带石英脉型和接触交代矽卡岩型钨多金属矿体。 相似文献
16.
《Journal of Asian Earth Sciences》2002,20(2):151-155
The Qianlishan granite complex, situated 16 km southeast of Chenzhou City, Hunan Province, China, hosts the Shizhuyuan W–Sn–Bi–Mo deposit. This complex, which intruded the Protozoic metasedimentary rocks and the Devonian clastic sedimentary and carbonate rocks, consists of mainly medium- to coarse-grained biotite granites and minor amounts of fine-grained biotite granite in addition to granite and quartz porphyry. K–Ar ages suggest three episodes of plutonism: the medium- to coarse-grained biotite granite (before 152 Ma), the fine-grained biotite granite (137 Ma), and the granite porphyry (129–131 Ma). Muscovite ages of the greisen are 145–148 Ma, suggesting that the W–Sn–Bi–Mo mineralization was related to the main, medium- to coarse-grained biotite granites. The K–Ar age of the hydrothermal vein mineralization is 92 Ma and is probably related to the porphyries. 相似文献
17.
黑龙江省双鸭山市羊鼻山铁钨矿床处于中亚造山带东段的佳木斯地块中部。兴东群大盘道组变质岩系为矿区主要赋矿地层,铁矿矿体呈层状、似层状赋存于大盘道组第一岩段,白钨矿矿体呈透镜状和脉状产于铁矿矿体底板围岩中,受片麻状花岗岩与大盘道组大理岩的接触带控制;主要含矿岩石为石榴石矽卡岩和透辉石矽卡岩,钨矿石中主要金属矿物为磁黄铁矿和白钨矿,并含少量磁铁矿、黄铁矿、黄铜矿、闪锌矿、锡石、毒砂和辉钼矿。含钨石英脉中δ18O水值为3.6‰~7.5‰,δD值为-120.9‰~-66.2‰,表明其成矿流体以岩浆水为主。矽卡岩中与白钨矿共生的金属硫化物δ34S值为16.1‰~18.1‰,206Pb/204Pb值为17.879~18.863,207Pb/204Pb值为15.537~15.603,208Pb/204Pb值为38.202~38.544,表明金属硫化物中的硫和铅主要来源于地层与地壳重熔型岩浆。结合钨矿成矿地质特征,认为羊鼻山铁钨矿床中钨矿的成因类型应属矽卡岩型。 相似文献
18.
十二排钼矿床位于上杭-云霄断裂带与闽西南拗陷的复合部位,是紫金山铜金矿田外围新近探明的一处具有中大型远景的斑岩型钼矿床。野外地质调查显示,其钼矿化呈细脉状、网脉状主要产出于黑云母二长花岗岩和黑云母花岗斑岩中。热液蚀变具有斑岩型矿床的分带特征,由黑云母花岗斑岩向外依次发育钾硅酸盐化带、绢英岩化带和青磐岩化带,钼矿体主要赋存于绢英岩化与钾硅酸盐化构成的叠加带中。锆石U-Pb定年结果表明,黑云母二长花岗岩和黑云母花岗斑岩分别形成于(143.1±0.9)Ma和(143.5±0.4)Ma。4件辉钼矿样品的Re-Os加权平均年龄为(143.9±2.1)Ma。辉钼矿的w(Re)为1.2×10~(-6)～7.8×10~(-6),说明成矿物质可能主要来自地壳。岩石地球化学分析结果显示,十二排含矿花岗岩具有相似的主量和微量元素组成,均属于弱过铝质高钾钙碱性I型花岗岩,其中,黑云母花岗斑岩表现出高分异花岗岩特征,两者可能是古老变质基底来源的熔体经历不同程度分异结晶的产物,并混入有少量幔源物质。综合已有的资料,文章认为十二排斑岩型钼矿化与早白垩世早期花岗质岩浆活动密切相关,上杭-云霄断裂带存在古太平洋板块俯冲后撤引发构造体制转换阶段的成岩成矿响应,进一步找矿勘查工作应加强评价早白垩世早期高分异花岗岩体的钼多金属成矿潜力。 相似文献
19.
MAO Jingwen LI Xiaofeng CHEN Wen LAN Xiaoming WEI Shaoliu School of Earth Sciences Resources China University of Geosciences Beijing Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing Institute of Geology Chinese Academy of Geological Sciences Beijing Southern Hunan Institute of Geological Survey Hunan Bureau of Geology MineralExploration Development Chenzhou Hunan 《《地质学报》英文版》2004,78(2):481-491
Furong, Hunan, is a large tin orefield discovered in China in recent years, which is mainly of the skarn-greisen-chlorite type. On the basis of the geological characteristics of the orefield, 40Ar-39Ar dating was performed on muscovite from greisen-type tin ore and biotite from related amphibole-biotite granite, which yielded three sets of age data, i.e., a plateau age of 157.5±0.3 Ma and an isochron age of 156.9±3 Ma for amphibole-biotite granite; a plateau age of 156.1±0.4 Ma and an isochron age of 155.7±1.7 Ma for the Sanmen greisen-type tin ore; and a plateau age of 160.1±0.9 Ma and an isochron age of 157.5±1.5 Ma for the Taoxiwo greisen-type tin ore. The three sets of age data coincide well with each other. They not only accurately reflect the timing of rock and ore formation but also indicate close relations between granite and tin deposits. In addition, the plateau ages of all three sets suggest that no subsequent thermal perturbation event occurred after the formation of granite and tin dep 相似文献